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The Microsoft.SqlServer.Types objects support Microsoft SQL Server Spatial data types for the SQL Server service and the client applications. The logic to populate a LineString object involves validation. The validation logic sorts vertices during the validation. The more vertices, the more work for the algorithm. This fix updates the sorting algorithm to include angular vectorization techniques that significantly improve the LineString performance.
You can enable the new algorithm in client code:
Note This should only be set for one time. A crash may occur when you change it during the validation.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.